JEE Main 2024 Chemistry question
Iron (III) catalyses the reaction between iodide and persulphate ions, in which A. Fe³⁺ oxidises the iodide ion B. Fe³⁺ oxidises the persulphate ion C. Fe²⁺ reduces the iodide ion D. Fe²⁺ reduces the persulphate ion Choose the most appropriate answer from the options given below:
Answer: (D)
Solution
2Fe³⁺ + 2I⁻ → 2Fe²⁺ + I₂, then 2Fe²⁺ + S₂O₈²⁻ → 2Fe³⁺ + 2SO₄²⁻.